Brake-band let-off



March 6, 1928. 1,661,925

E. CORMIER v BRAKE BAND LET-OFF Filed Dec. '7, 1925 2 Sheets-Sheet 1 AHORNEY March 6, 1928.

E. CORMIER BRAKE BAND LET-OFF Filed Dec. '7, 1925 2 Sheets-Sheet 2 INVENTOR ATTORN EY Patented Mar. 6,1928. r if 7 1,661,925 UNITED ST S PATENTOFFICE.

EMERY CORMIER, OF NASHUA, NEW HAMPSHIREYASSIGNOR OF ONE-HALF TQ FRED-- ERICK CHARLES SASSE, OF N ASHUA, NEW HAMPSHIRE. w i I 1 BRAKE-BAND LET-Orr. Application filed December 7, 1925. Serial No. 73,852.

This invention relates to a let ofi for tened to theend of shaft 8 by the set screw warp beams, the general object-of the inven- 17 and a pressure plate 18 isadjustably con tion heingto provide means whereby the nected with'the' outer end of the arm 16. rate of let-oil and tension of the brake is This plate is of curved formation, with its varied in direct proportion to the decrease in ends curvedupwardly and is arranged to on size of the warp beam during the weaving engagethewarps on the beam. The frame operation, thus insuring an even woven cloth 7 1S adJusted on thebracket 6 by means of a with uniform lengths and widths and to threaded shaft 19 engaging a nut part 20 on eliminate unsightly weights and cables on the frame, said shaft being rotatably supthe'warp beams, ported by the bracket 6 and having a hand so Another object of the invention is to pro wheel 21 thereon by which it may be turned. vide means whereby the weaver can easily The brakes are placed on the beam heads render the invention inactive whenever he by first lifting up the levers 15 to widen the desires to turn back the warp. v b e bands so that the bands can be placed to This invention also consists in certain 1n the grooves in the heads. The springs 70 other features of construction and in the are thenadjusted by placing the parts in the. combination and arrangement of the sevpr per holes to obtain the .propertensiom eral parts, to behereinafter fully described, T ev rs 15 are then swung downwardly illustrated in the accompanying drawings S to Cause the b k t t g y a and specifically pointed out in the appended evenly engage the heads, Asbefore stated, Claims. p V the brakes are prevented from rotatinglwith In describing my invention in detail, 'refthe beads by fas ning the brakes to staerence will be had to the accompanying n y pa ts by means of the chains. The drawings wherein like characters denote P P e 1 f each assembly will then :3 lik or Corresponding parts th h t th be bearing with even pressure on the warp, 50

Several i d i hi h as the spring 12 will act. to rotate the shaft 8 Figure 1 is an end view showing the in d s Cause h arm 16and plate 18 to enfion in use 011 a arp bean SWlIlg Cl OWHWELI'Clly llntll SElld plate 13 bear- Figure 2 is a plan view. g agalhst the P- The Pressure With 89 Figure 3 is a front view of a warp beam, Yvhlch the Pl engages the p is 85 with the attachment at each end thereof. jl t d y a justlng the frame 7 0n bra ket Figure 4 is a section on line 4-.4 of Fig- 6 y means 033 the Screw Shaft i urg1 An even pressure is thus maintained on Fi 5 i a ti on li 5 5 f Fi the warp from a full sized warp until it is ure 1. all run out on the beam without changing. so

As shown in these views, I place a brake the fldlustmeht, as the p i g 12 exercises band 1 in the groove of each head of the, an GVBII pull 011 the arm 16 fIOlIl beginning warp bear A, this band being provided to end of 'P- h curvature of Plate 18 with a it bl li i 2 d a h i 3 i tand the fact that ltlS made of polished steel t k d t th Supports 4 on th b d so Wlll prevent said plate from injuring the that the brake can be fastenedto a stationfinest P- ary part of the apparatus, as shown at 5, to Should the weaver wishto turn back the prevent movement of the brake on the head. I P y a all has do is to A bracket 6 is supported from the band and 11ft p h levers 1 to release t e b ake lid bl s ort a fra e 7 i whi h is bands which will permit himto do the necesj l d a h ft 8, An arm 9 i dj t bl sary work, after which the levers are swung connected with said shaft by the set screw downwardly g l l f 10 and said arm is provided with a number This let off insures evenly woven cloth as f forati n 11 so that one nd of a oil d it; exercises an even pressure at all times on pring 12 can be adjustaloly connected with the warp and does not work by jerks and is E the arm. The other end of the spring is atnot affected by weather conditions, as are tached to a hook 13 which is adapted toenme f he let .oifs now on'the market. gage any one of a number of'holes 14 in a As will be seen, as the warp beam delocking lever 15 which is pivoted to the vcreases in size, the tension of the spring upper support 4:. A curved arm 16 is faswill decrease and thus the brake will offer less resistance to the beam heads; so that the rate of let-ofli and tension of the brake is varied in direct proportion to the decrease in size of the warp beam during the .aveaving operation. a

It is thought from the foregoing descrip tion that the advantages and novel features of my invention will be readily apparent.

I desire it to be understood that I may make changes in the construction and in the combination and gii'ialiigeiiieiit of the several parts, provided that such changes fall within the scope of the appended claims.

\Vhat I claim is A h j 1; A brake and let-ofi' for a loom comprising a brake band engaging a. part ofthe warp beam, a bracket arm projecting tangentially from said band, a frame slidably adjust'able longitudinally of said arm, means for adjustingsaid frame toivardand away from said band, ,a rock shaft carried by the ,frame, an arm projecting from the shaft, a coil spring having one end connected with the last mentioned arm and its other end connected with relation to the band. a second armcarried by the rock shaft, and a pressure plate carried by the second mentioned arm for engagin the Warp on the beam.

2. A brake an let-oif for a loom comprising a brake band engaging a part of the warp beam, a bracket arm projecting tangentially from said band and offset atone end, aframe slidably mounted on said arm and including a depending threaded lug, an adjusting screw journaled in said oilset ex- .tremity of the arm and threadedly associated with said lug whereby said frame may be adjusted, a rock shaft carried by the frame, an arm projecting from said shaft, a coil spring having one end connected with the arm and its other end connected with a part of the brake band, a second arm on the rock shaft, and a pressure plate carried by the second mentioned arm for engaging the warp on the beam.

3. A brake and let-oft for a loom comprising a brake band engaging a part of the warp beam, a bracket arm projecting tangentially therefrom, a frame slidably mounted on the arm, means for adjusting said frame, a rock shaft jonrnaled in the fame, an arm projecting from said shaft and having spaced openings, a locking lever pivoted on the band in spaced confronting relation to said arm and havin a lurality of spaced openings, a link adapted to be singly received by said last mentioned openings, a coil sprin terminally connected with the link and the arm projecting from the shaft a second arm on the rock shaft and curved longitudinally, and a pressure plate carried by the second mentioned arm for engaging the warp on the beam.

EMERY CORMIER. 

